The U.S. Geological and Geophysical Survey of the Territories, conducted by Hayden, en route
with pack train upon the trail between the Yellowstone and East Fork Rivers "showing the manner in
which all parties traverse these wilds." Wyo. Terr. By Jackson, 1871.

280k

First camp of the John Wesley Powell expedition, in the willows, Green River, Wyo. Terr. By E. 0.
Beaman, 1871.